Thermostat.



W. ENTERLINE.

THBRMOSTAT.

APPLICATION FILED mm: 19, 1909.

Patented June 7, 1910. v

8 m. h m *w M m m H M WITNESSES A TTORNE Y8 WILLIAM ENTER-LINE, OF BIG- RUN, PENNSYLVANIA.

THERMOSTAT.

Specification of Letters Patent.

Patented June 7, 1910.

Application filed June 19, 1909. Serial No. 503,091.

T 0 all whom "it may concern:

Be it known that I, VILLIAM EN'rnRLINn, a citizen of the United States, and a resident of Big Run, in the county of J efi'erson and State of Pennsylvania, have invented a new and Improved Thermostat, of which the following is a full, clear, and exact description.

My invention relates to thermostats, and it has for its object to provide one for regu lating the flow of gas used to heat water in boilers, which is certain in its operation, and one which may be manufactured and repaired at little expense.

In this specification I will describe the preferred form of my invention, it being understood that the scope of the invention is defined in the appended claims.

Reference .is to be had to the accompanying drawings forming a part of this specification in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective View showing my thermostat as applied to a boiler; and Fig. 2 is a side sectional view of my thermostat on an enlarged scale.

By referring to drawings it will be seen that the boiler 1 has a threaded orifice 2 therein through which is disposed an elongated liquid case 3, the li uid case 3 having a threaded ortion 4, which meshes in the threaded orifice 2 of the boiler 1. In the liquid case 3 there is a threaded orifice 5, preferably at its inner terminal, in which is disposed a plunger screw 6. The outer terminal 7 of the liquid case 3 is open, and at this terminal there is an annular outwardly disposed flange 8. The gas case 9 has an annular threaded flange 10, which is adapted to be dis osed around the flange 8 of the liquid case with a dia hragm 11 disposed between the flan e 8 of the liquid case 3 and an annular shou der 12 of the gas case 9, a nut 13 being provided to enga e the threads in the annular flange 10, an to press the annular flange 8 of the liquid case 3 toward the annular shoulder 12 to hold the spring dia hragm 11 in position.

acking 14 may be disposed between the spring diaphragm 11 and the annular shoulder 12, an also between the diaphragm 11 and the annular flange 8 to prevent leakage. The spring diaphragm 11 has a nip le 15 on whlch is mounted a valve 16, the valve 16 having a concavo-convex surface 17 with an orifice through which the nipple projects. A communicating means 18, the inner terminal of which forms a valve seatwhich is commanded by the valve 16, is adapted to lead the gas to the gas case 9, and a communicating means 19 is adapted to lead the gas to the burner under the boiler 1. A by-pass 20 connects the communicating means 18 with the gas case 9, this by-pass 20 being commanded by a screw 21.

The liquid case 3 is preferably manufac tured of expansion metal that expands when cooled, and contracts when heated. \Vhen the liquid is disposed in the liquid case?) in approximately a sulticieut quantity with reference to its character and the size of the liquid case, its expansion will operate the diaphragm 11 to close the valve in the ommunicating means 18. \Vhen the liquid case 3 is disposed through the side of the boiler 1, as has been stated, with the communicating means 19 leading to a burner, not shown, under the boiler 1 the flame at the burner will heat the water in the boiler. \Vhen the water in the boiler becomes heated it will cause the liquid in the liquid case 3 to ex" pand which will press the diaphragm 11 in the direction of the communicating means 18, and when the water becomes heated to a predetermined degree it will press the valve close against the valve seat in the communicating means 18, thereby cutting off the supply of gas.

As it is seldom considered to be advisable to completely shut oil the flow of gas, which would cause the flame to go out, the by-pass 20 is provided which, when the screw 21 is opened, will permit a suflicient quantity of gas to flow around the valve to feed a small flame at the burner, even though the valve is pressed against its valve seat to prevent any flow of gas therethrough.

In adjusting the liquid case 3 the plunger screw 6 is used to obtain a fine adjustment, for it will be seen that by turning the lunger screw so that it projects into the liquid case 3, the proportion of the liquid with reference to the internal dimension of the liquid case is altered.

Having thusdescribed my invention, I claim as new and desire to secure by Letters Patent:

1. In a thermostat, a liquid case adapted to project through the side of a boiler, there being a threaded orifice in the liquid case, a plunger screw disposed in the threaded orifice, flanges dis osed outwardly around an o ening 1n the quid case, a gas case, a dia ragm, having a nipple, covering the sai opening in the liqui case, means for pressin the diaphra m between the flange of the hquid case, an a shoulder on the gas case, a valve disposed in the gascase, mounted on the nipple, a communicating means 1n the gas case leading to the valve and formin a valve seat, which is commanded by the va ve, a second communicatingmeans leading from the gas case, a by-pass connecting the first communicating means with the gas case, and means to command the by-pass.

2-. In a thermostat, a liquid case adapted to project through the side of a boiler, there being a threaded orifice in the liquid case, a plunger screw disposed in the threaded orifice, flanges disposed outwardly around an opening in the liquid case, a gas case, a diaphragm, having a nipple, covering the said opening in the liquid case, means for pressing the diaphragm betweep the flange of the iquid case, and a shoulder on the gas case, a valve disposed in the gas case, mounted on the nipple, a communicating means in the gas case leading to the valve and forming a valve seat, which is commanded by the valve, and a second communicating means leading from the gas case.

3. In a thermostat, a fluid case hermetically sealed at one end, there being a threaded orifice in the fluid case, a plunger screw disposed in the threaded orifice, the fluid case having a threaded surface which is adapted to mesh in a threaded orifice in a boiler, flanges disposed around an opening in the other end of the .fluid case, a gas cas'e,-a dia hragm covering the said opening in the uid case, means for pressing the diaphragm between the flanges of the liquid case and a shoulder on the as case, a valve disposed in the gas case wliich is mounted on the diaphragm, a communicating means in the gas case leading to the valve and forming a valve seat which is commanded by the valve, and a communicating means leading from the gas case.

4. In a thermostat, in combination, an elongated fluid case hermetically sealed at one end, which is ada ted to be disposed in a boiler, a fluid in t e fluid case, flanges disposed around an opening in the other end of the fluid case, a gas case having an annular threaded extension, a diaphragm covering the said opening in the fluid case, a nut enga ing the thread in the annular extension 0 the gas case and ada ted to press against the annular flange o the hquid case, thereby forcing the dlaphragm against an annular shoulder on the gas case, a valve disposed in the gas case mounted on the diaphragm, communicating means in the gas case leadin to the valve and forming a valve seat w hich is commanded by the valve, and a communicatin means leading from the gas case one of t c said communlcating means being disposed at an angle to the liquid case.

5. In a thermostat, a liquid case, a threaded orifice in the liquid case, a plunger screw disposed in the threaded orlfice, an out-v wardly disposed flange around an opening in the liquid case, a gas case having an annular threaded extension, a dia hragm covering the said opening in the liquid case, a

nut engaging t e thread on the annular extension of the gas case and adapted to press against the annular flan e of the liquid case thereby forcing the diap ragm against an annular shoulder on the gas case, a valve disposed in the gas case mounted on the diaphragm, a communicating means in the gas case leading to the valve and forming a valve seat, which is commanded by the valve, a second communicating means leading from the gas case, a by-pass connecting the first communicating means with the gas case, and means to command the by-pass.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM ENTERLINE. Witnesses:

J. M. MILLER, S. H. Gormnnr. 

